add line key programs

Author: youssefea

docs/base-chain/quickstart/base-solana-bridge.mdx

@@ -37,6 +37,7 @@ It represents the `msg.sender` on Base when you send an arbitrary contract call
 
 ### On Solana
 The Solana bridge program locks or burns your tokens and emits events. Validators relay these messages to Base where they're executed through your personal Twin contract - a smart contract that acts as your execution context on Base.
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 **Key Programs:**
 - [**Bridge Program**](https://github.com/base/bridge/blob/main/solana/programs/bridge): Handles outgoing transfers
 - [**Base Relayer Program**](https://github.com/base/bridge/blob/main/solana/programs/base_relayer): Coordinates message relay